Answer / iamdon

The primary and secondary windings are used for normal
voltage/current transformation where as the tertiary
winding is used for following special purposes

1)Supply to substation auxiliaries.
2)Connecting static capacitors/synchronous condenser etc

The tertiary winding is connected in delta to allow the
flow of zero sequence current in the tertiary loop in the
case of unbalance.

Author:arbelectbit@yahoo.com

Answer / gunasekaran

the above answer is correct another one is keep the neutral
should be zero potential and it is giving closed bath for
third hormonics current

Why frequency changes due to load variation in power system ? i.e why when load increases frequency decreases?

0 Answers   Madina Group,

---

What is the breakdown voltage?

13 Answers  

---

What is rotary phase converter?

0 Answers  

---

why we used.c source in the field of the alternator , why not a.c source.

1 Answers  

---

as we see that in our country the power rating for transmission is always rated in multiple of 11 like 11kv,33kv,66kv132kv. So i want to know wht is reason or logic here.

2 Answers  

---

---

What will happen if supply frequency change in Transformer KVA rating ?

1 Answers  

---

what is power factor? is it good or bad for a system? what will happen if power factor increase or decrease?

4 Answers   Bhel,

---

The moisture in air will condense at

0 Answers   Caterpillar,

---

Can a generator rated 400 V, 60 Hz be used in a 50 Hz System? Yes or No ? Why ?

1 Answers   VECL,

---

What is the comparision (advantages / disadvantages) of 110V, 60 Hz system to 230 V, 50 Hz system.

2 Answers  

---

Explain Continuous and Discrete signals?

0 Answers   UOG,

---

When the DG is running at the time we can connect to capacitor banK? why it is required or not

1 Answers  

---